Multimode digital radio frequency remote system

A digital radio remote and remote technology, applied in electrical components, wireless communication, network topology and other directions, can solve problems such as unfavorable multi-mode digital radio remote system promotion and application, achieve good market prospects, save fiber resources, The effect of flexible and convenient networking

Active Publication Date: 2014-09-10
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to realize the multi-mode digital radio remote system, through the description of the working process of the communication network of different standards above, a defect can be found, that is, when the GSM base station and the TD-RRU are not in the same place, and there is no optical fiber resource between the two places If it is connected, this will bring great limitations to the application of the multi-mode digital remote radio system, which is very unfavorable for the promotion and application of the multi-mode digital remote radio system

Method used

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  • Multimode digital radio frequency remote system
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  • Multimode digital radio frequency remote system

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0019] Taking the multi-mode digital remote radio system of GSM+TD+WLAN as an example, the multi-mode digital remote radio system of the present invention includes a GSM repeater, a TD repeater, a remote coverage machine and a baseband router.

[0020] Such as figure 2 Shown is the block diagram of the hardware digital module of the baseband router, the baseband router includes FPGA chip, CPU, power supply POWER, two optical ports OP1 and OP2 respectively connected to the near-end repeater, two TLK1501 (serializer / deserializer device), a TLK4015 (serializer / deserializer), four optical ports OP1', OP2', OP3' and OP4' respectively connected to different remote coverage machines. Taking the downlink signal transmission direction of the baseband router as an example, OP1 and OP2 realize the serial / parallel conversion of the signal through TLK1501 and send the signal to the FPGA chip. Convert and send signals to the optical ports OP1', OP2', OP3' and OP4' respectively; POWER prov...

Embodiment 2

[0044] As a preferred embodiment, the remote coverage machine may also include a CFR (Crest FactorReduction, crest factor reduction) module, a DPD (Digital Pre-Distortion, digital pre-distortion) module, a feedback down-conversion module and a feedback A / D converter, The CFR module is respectively connected to the digital up-conversion channel and the DPD module, the DPD module is also connected to the D / A converter, the feedback down-conversion module is connected to the downlink power amplifier and the feedback A / D converter, and the feedback A / D conversion The device is also connected to the DPD module, as shown in Figure 6.

[0045] Taking the GSM channel as an example, after the baseband signal is up-converted into an intermediate frequency digital signal through the digital up-conversion channel 451, the signal is firstly processed through the CFR module 452 using the peak-cutting technology, and then the DPD module 453 receives the signal sent in the CFR and DPD technol...

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Abstract

Disclosed is a multimode digital radio-frequency remote system. The system comprises at least one remote covering machine, a baseband router and a plurality of local relays. The remote covering machine is connected with the baseband router, and the baseband router is connected with all the local relays respectively. The baseband router is used for receiving signals of different modes from the local relays, and sending the combined signals to the remote covering machine; and receiving signals from the remote covering machine, and sending the split signals respectively to the local relays of the corresponding modes. The present invention solves the problem that the application of the multimode digital radio-frequency remote system is restricted under the conditions that the local relays of different modes are not in the same place and no optical fiber is connected between the relays, so that the application restriction of the multimode digital radio-frequency remote system is alleviated, and the flexible application of the multimode digital radio-frequency remote system is realized. Moreover, through the present invention, a lot of optical fiber resources are saved, the networking is convenient, and the market prospect is better.

Description

technical field [0001] The invention relates to the field of digital repeater system design, in particular to a multi-mode digital radio remote system. Background technique [0002] In the mobile communication network, the digital remote radio system, as the extension and supplement of the base station in the coverage network, can improve the signal quality and solve the problem of call drop in weak signal areas and blind areas, and has increasingly become the main part of mobile communication network coverage. At this stage, 2G network and 3G network will coexist for a long time in the mobile communication network. Mobile operators currently have TD licenses for 3G networks and 2G networks that have been in operation, plus WLAN networks that are more and more widely used, and have 2G, 3G and WLAN transmission at the same time. The advanced multi-mode digital radio remote system will save a lot of cost for operators to build multi-networks, and will also bring great convenie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/26H04W88/10H04W88/14
CPCH04W88/085H04W84/047H04W88/10
Inventor 叶祖铨陈春海黄伯宁伍尚坤李龙芳
Owner COMBA TELECOM SYST CHINA LTD
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